裂纹源焊道焊接方式对落锤无塑性转变温度的影响规律  

Influence of crack source welding method on drop weight NDT temperature

作　　者：丁阳 张茂龙 谢竞华 纵海 侯冬冬 李思昊 DING Yang;ZHANG Maolong;XIE Jinghua;ZONG Hai;HoU Dongdong;LI Sihao(Shanghai Electric Nuclear Power Equipment Co.,Ltd.,Shanghai 201306,China)

机构地区：[1]上海电气核电设备有限公司,上海201306

出　　处：《物理测试》2024年第4期6-12,共7页Physics Examination and Testing

摘　　要：利用落锤试验机、光学显微镜对裂纹源焊道焊接方式对落锤无塑性转变(NDT)温度的影响规律进行研究,选取不同散热方式、不同焊接电流大小、不同焊道长度、不同焊道宽度的角度。结果表明:散热方式、焊接电流大小对落锤NDT温度有显著影响,而焊道长度、宽度则没有显著的影响规律,同时熔深、热影响区及粗晶区的面积是影响落锤NDT温度的本质原因。The influence of crack source weld bead welding methods on the drop weight NDT temperature was studied using the drop weight testing machine and optical microscope.Different heat dissipation methods,different magnitudes of welding current,different weld bead lengths,and different weld bead widths were selected and investigated.The results showed that the heat dissipation method and welding current had a significant influence on the drop weight NDT temperature,while the length and width of weld bead had no significant impact.Meanwhile,the melting depth,the area of heat affected zone,and the area of coarse grain zone were the essential reasons to affect the drop weight NDT temperature.

关 键 词：散热方式 焊接电流 焊道长度 焊道宽度 落锤NDT温度 熔深 热影响区及粗晶区面积 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TM623[金属学及工艺—金属材料]